president obama, the nation's first black president, spending exactly where dr. king stood, reflecting on the progress and the work that remains. >> no one can match king's brilliance, but the same flame that let the heart of all who were willing to take the first step for justice, i know that flame remains. >> jim crow had a son called james crow jr. esquire. he writes voting suppression laws, and puts it in language that looks different but the results are the same. >> reporter: standing between three presidents on one side, and the king family on another, congressman john lewis, the last surviving speaker of the '63 march, challenged the nation, as dr. king did to make good on its promise. >> unemployment, poverty, and hunger, or the new struggle for voting rights. i say to each one of you today, we must never, ever give up. >> reporter: president obama and others pointed out the original march was about jobs and justice. noting the unemployment for blacks is almost twice the national average. >> more details now about the march. the sound system was sabotaged